Backstitch is used to sew two pieces of fabric or felt together with a seam allowance. Backstitch is a good replacement for machine sewing if you wish to sew the garments by hand. Use a single toning sewing thread on your needle.
Following Fig.2, bring the needle up at point 1 and then back to point 2. Bring it out at the top again beyond point 1 at point 3, and then back through at point 4, which should be very close to or in the same place as point 1. Repeat along the seam.